<template>
  <div class="permission-container">
    <div class="app-container">
      <!-- 表格 -->
      <el-card>
        <div style="text-align: right; margin-bottom: 20px">
          <el-button type="primary" size="small" @click="hAdd(1,'0')">添加权限</el-button>
        </div>
        <el-table border :data="list" row-key="id">
          <el-table-column label="名称" prop="name" />
          <el-table-column label="标识" prop="code" />
          <el-table-column label="描述" prop="description" />
          <el-table-column label="操作">
            <template v-slot="{row}">
              <!-- type为1时为页面级访问权限，它可以继续做添加： 设置页面下边某个功能是否可以操作 -->
              <!-- type为2时为按钮级别的访问权限，它就不能再继续细分了，它就没有添加了 -->
              <el-button v-if="row.type==1" type="text" @click="hAdd(2, row.id)">添加</el-button>
              <el-button type="text" @click="dEdit(row.id)">编辑</el-button>
              <el-button v-if="row.children.length == 0" type="text" @click="hDel(row.id)">删除</el-button>
            </template>
          </el-table-column>
        </el-table>
      </el-card>
    </div>
    <!-- 新增弹框 -->
    <el-dialog
      :title="isEdit ? '编辑' : '添加'"
      :close-on-click-modal="false"
      :close-on-press-escape="false"
      :visible.sync="showDialog"
      @close="resetForm"
    >
      <!-- 表单内容 -->
      <el-form ref="refForm" label-width="100px" :model="formData" :rules="rules">
        <el-form-item label="权限名称" prop="name">
          <el-input v-model="formData.name" />
        </el-form-item>
        <el-form-item label="权限标识" prop="code">
          <el-input v-model="formData.code" />
        </el-form-item>
        <el-form-item label="权限描述" prop="description">
          <el-input v-model="formData.description" />
        </el-form-item>
        <el-form-item label="权限启用" prop="enVisible">
          <el-switch
            v-model="formData.enVisible"
            active-text="启用"
            active-value="1"
            inactive-text="不启用"
            inactive-value="0"
          />
        </el-form-item>
      </el-form>

      <template #footer>
        <div style="text-align: right;">
          <el-button @click="showDialog = false">取消</el-button>
          <el-button type="primary" @click="hSubmit">确定</el-button>
        </div>
      </template>
    </el-dialog>
  </div>
</template>

<script>
import { addPermission, getPermissionList, delPermission, getPermissionDetail, updatePermission } from '@/api/permisson'
import { arrTotree } from '@/utils/index'
export default {
  data() {
    // 同级便是校验
    const validCode = (rule, value, callback) => {
      // 添加时的校验：code不能重复
      let existCodeList = this.originList
      if (this.isEdit) {
        // 编辑时的校验: code能取自己
        existCodeList = this.originList.filter(item => item.id !== this.formData.id)
      }
      existCodeList.map(it => it.code).includes(value)
        ? callback(new Error(value + '已经占用'))
        : callback()
    }
    // 同级部门校验
    const validName = (rule, value, callback) => {
      // 添加时的校验： 名字不能取子元素的名字
      let existNameList = this.originList.filter(item => item.pid === this.formData.pid)
      if (this.isEdit) {
        // 编辑时的校验： 名字不能取兄弟（排除自己）的名字
        // 找兄弟，排除自己
        existNameList = this.originList.filter(item => item.pid === this.formData.pid && item.id !== this.formData.id)
      }
      existNameList.map(it => it.name).includes(value)
        ? callback(new Error(value + '已经占用'))
        : callback()
    }
    return {
      list: [],
      showDialog: false,
      isEdit: false,
      formData: {
        name: '', // 名称
        code: '', // 权限标识
        description: '', // 描述
        enVisible: '0', // 开启
        pid: '', // 添加到哪个节点下
        type: '' // 类型
      },
      rules: {
        code: [{ message: '不能为空', required: true, trigger: 'blur' }, { validator: validCode, trigger: 'blur' }],
        name: [{ message: '不能为空', required: true, trigger: 'blur' }, { validator: validName, trigger: 'blur' }]
      },
      originList: [] // 在做校验时需要用到的数据
    }
  },
  created() {
    this.loadPermission()
  },
  methods: {
    resetForm() {
      this.formData = {
        name: '', // 名称
        code: '', // 权限标识
        description: '', // 描述
        enVisible: '0', // 开启
        pid: '', // 添加到哪个节点下
        type: '' // 类型
      }
    },
    hSubmit() {
      this.$refs.refForm.validate(valid => {
        if (!valid) return
        this.isEdit ? this.doEdit() : this.doAdd()
      })
    },
    async doEdit() {
      await updatePermission(this.formData)
      this.$message.success('修改成功')
      this.showDialog = false
      this.loadPermission()
    },
    // 点击编辑
    async dEdit(id) {
      this.isEdit = true
      this.showDialog = true
      // 根据id去获取权限
      const { data: res } = await getPermissionDetail(id)
      // console.log(res)
      // 数据回填
      this.formData = res
    },
    async doAdd() {
      const res = await addPermission(this.formData)
      this.$message.success('添加成功', res)
      this.showDialog = false
      this.loadPermission()
    },
    // 点击添加
    hAdd(type, id) {
      this.isEdit = false
      this.showDialog = true
      // 记录当前添加的关键信息
      this.formData.type = type
      this.formData.pid = id
    },
    async doDel(id) {
      await delPermission(id)
      this.$message.success('删除成功')
      this.loadPermission()
    },
    // 点击删除
    hDel(id) {
      this.$confirm('确定删除吗?', '系统提示').then(() => {
        this.doDel(id)
      }).catch(() => {})
    },
    // 加载权限列表
    async loadPermission() {
      const { data: res } = await getPermissionList()
      console.log(res)
      this.originList = res.map(({ id, pid, name, code }) => ({ id, pid, name: name.trim(), code }))
      this.list = arrTotree(res)
    }
  }
}
</script>
